The exhausts do pop and burble, usually when after acceleration when you let off the gas.
Accelerate, let off the gas suddenly, pop, bang, burble, pop and
Tigger has an after market exhaust which amplifies it and makes it really loud. It's not unusual to hear a pretty loud pop, but it shouldn't feel jarring. I can't remember but I think 2011 is the year they brought the sound back. It was in the first gens, then they removed it for the early second gens and people complained so they brought it back.
It does sound a lot like an exhaust leak, but more intentional